EUR/CHF retreats to 0.9870 EBS low after early Europe rise to threaten 0.99

There is a large 0.9900 option expiry for the 10am ET NY cut nL1N33D0B4

Big expiries can impact foreign exchange rates, re: option-related flow

0.9818 was Thursday's EBS Dec low for EUR/CHF (0.9914 was Monday's high)

SNB's forex reserves shrank to 873 billion francs during the third quarter

See: nL8N33C1PN. SNB FX transaction data due next week (Dec 30)